Simply select the applications, features and functions you require and we’ll tell you the best sound level meter for your requirements. The A, C & Z Frequency Weighting is measured simultaneously by all our Optimus® Sound Level Meters. The weighting scale is based on a curve at 40 phon equal loudness and is the level and frequency dependence of hearing for pure tones for quiet sounds useful. For example, the frequency weightings used on a sound Measurements made using Z-weighting are usually shown with dB(Z) to show the information is Z-weighted or, for example, LZeq, LZFmax, LZE etc.įrequency weightings are defined in the standards to which a noise measurement Is a flat frequency response between 10Hz and 20kHz ☑.5dB excluding microphone response. Information is C-weighted or, for example, LCeq, LCPeak, LCE etc. Made using the C-weighting are usually shown with dB(C) to show that the Measurement of Peak Sound Pressure level. Is a standard weighting of the audible frequencies commonly used for the Is ‘A’ weighted or, for example, as LAeq, LAFmax, LAE etc. If a threshold is used, all samples below the threshold are ignored in the averaging calculations. Made using A-weighting are usually shown with dB(A) to show that the information The average sound pressure level over a period of time. The shape approximates the frequency sensitivity of the human ear. ‘A’ weighting filter covers the full frequency range from 20Hz to 20kHz, but dBA A-weighted Noise Level is the sound level obtained by using the A-weighting. Is the standard weighting of the audible frequencies and reflects the response In mathematical terms, the sound pressure. The Cirrus Optimus Sound Level Meters will measure all three frequency weightings at the same time, saving you the risk of measuring the wrong parameter. The most used frequency weightings you will see on a modern sound level meter, or noise dosimeter are ‘A’, ‘C’ and ‘Z’. Instrument that adjust the way the instrument measures the noise. Noise dosimeter to measure and report noise levels that represent what we hear,įrequency weightings are used. Sensitive to frequencies above and below these. Your sound level meter or noise meter, you will often see references to frequencyĮars are most sensitive to frequencies between 500Hz and 6kHz and are less
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